Ebony Twilight Metallic 2019 GMC Sierra 3500HD Denali Duramax 6.6L V8 Turbodiesel 4WD Allison 1000 6-Speed Automatic Allison 1000 6-Speed Automatic, 4WD, Jet Black Leather. 2 Years Free Oil Changes. Recent Arrival! Odometer is 6995 miles below market average!